PPT-FLATWORMS

Belong to the KINDGOM ANIMALIA PHYLUM PLATYHELMINTHES Characteristics Three germ layers endoderm ectoderm mesoderm Bilateral symmetry Cephalization has a head 4 Acoelomates without . 4 2 collected with planktonic acoel flatworms with algal endosymbionts the open Slope Waters, sp. 'C' sp. 'C' sp. 'C' sp. 'C' Dark brownb Dark brownb Dark brownb Dark brownt' Dark brownb Collected wit Phylum: PLATYHELMINTHES. . VS.. Class . Turbellaria. includes: Planarians . Class . Cestoda. Includes: Tapeworms. Class . Trematoda. Includes: Flukes. II. Body Plan/Structure. Flatworms demonstrate a . Worms:. Flatworms and Roundworms. Biology 11. Worms. Divided into 2 Groups. Unsegmented. Flatworms. Roundworms. Segmented. Annelids . Phylum Platyhelminthes. Platy= flat. Helminth. =worm. The Flatworms. Link to video. Flatworms - General Information. 3. . phyla in Ch. 14 – We are going to focus . mainly on . Phylum Platyhelminthes . Symmetry. : Bilateral. Cephalization. - head end concentrated with sense organs and nervous control. Link to video. . Link to video. Flatworms - General Information. Symmetry. : Bilateral. Cephalization. - head end concentrated with sense organs and nervous control. Tripoblastic. - has a middle germ layer (mesoderm) as well as ectoderm and endoderm . phyla: . Platyhelminthes – flatworms (. Gk. ) . plati. . – flat. . . helminth. - worm. Nematoda. – roundworms, . nema. . (. Gk. ) ". thread". Annelida – segmented worms, . . . PLATYHELMINTHES. (flatworms, tapeworms). Porifera. Cnidaria. Ctenophora. Platyhelminthes. Rotifera. Nematoda. Nemertea. Mollusca. Annellida. Arthropoda. Bryozoa. Phoronida. Brachiopoda. Echinodermata. By: Nayarit Ayala and Marleni Cruz. Flatworms. Platyhelminthes. Structure. Flatworms are flat, soft bodied, ribbon shaped . unsegmented. , contain no body cavity, but they do have digestive cavity. They are bilateral symmetrical, while having only one opening. Flat worms have layers of tissues that surround their central gut. They are part of the acoelomates, and are considered hermaphroditic. Their type of cell layers are: an ectoderm, which is the outer covering, an endoderm, which is the lining of digestive spaces, and a mesoderm which is in between the other two. 27-1 Flatworms. What is a Flatworm?. What are some of the defining features of flatworms?. What is a flatworm?. Flatworms are soft, flattened worms that have tissues and internal organ systems. . They are the simplest animals to have three embryonic germ layers, bilateral symmetry, and . Period 5. General Description. Phylum- Platyhelminthes contains flatworms. Soft, unsegmented, & flat (no more than a few mm thick). Tissues (tripoblastic) & internal organ systems. Simplest animals to have: 3 embryonic germ layers, bilateral symmetry, & cephalization. Characteristics. . Unsegmented. worms. Simplest animals with. . Bilateral symmetry. No . specialized . circulatory. or . respiratory. system. (uses diffusion to transport oxygen and . nutrients). ). (8,761 known species). General Description: . Simplest animals, multicellular. No organs or body systems. Skeleton composed of spongin (soft) and spicules (hard). Symmetry: . Asymmetrical. Feeding: . Vocabulary words:. invertebrate-. an animal without a backbone. Vocabulary words:. sponge. - a simple invertebrate that has a hollow body with a single opening and lives in water. Lesson 1 – Animals without a Backbone. Characteristics of Phylum Platyhelminthes (means “flat worm”). Flatworms have . three germ layers (. triploblastic. ); they are the first animal we have discussed in this class with . true organs and tissues.